Alex1990

/**
 * Common regular expressions
 */
var rules = {
  alphabet: /^[a-zA-Z]+$/,
  numeric: /^[0-9]+$/,
  alphanumeric: /^[0-9a-zA-Z]+$/,
  alphadash: /^[0-9a-zA-Z_]+$/,
  ascii: /[\x00-\xff]/,
  nonascii: /[^\x00-\xff]/

Alex1990

/**
 * Convert mouse events into touch events.
 * From: http://ross.posterous.com/2008/08/19/iphone-touch-events-in-javascript/
*/
function touchHandler(event) {
    var touch = event.changedTouches[0];

    var simulatedEvent = document.createEvent("MouseEvent");
        simulatedEvent.initMouseEvent({
        touchstart: "mousedown",

Alex1990

#!/usr/bin/env bash

# The "Common Name (CN)" can be "example.com" or "*.example.com www.example.com"
# This command should be executed in non-root mode

domain="$1"

if [ -z "$domain" ]; then
  echo "need domain parameter"
  exit 1

Alex1990

async function retry(fn, times = 0, ...args) {
  if (typeof times !== 'number') throw new Error('times must be a number')
  if (times < 0) throw new Error('times must not be less than 0')
  const totalTimes = times + 1
  let result
  let firstError
  let i = 0
  for (; i < totalTimes; i++) {
    try {
      result = await fn(...args)

Alex1990

/**
 * Get the current active element safely.
 * Ref: https://github.com/jquery/jquery-ui/blob/2b84531ae9331f60e4d739fabca6d78abde89ae1/ui/safe-active-element.js
 */
function safeActiveElement(doc) {
  doc = doc || document;
  var activeElement;

  // Support: IE 9 only
  // IE9 throws an "Unspecified error" accessing document.activeElement from an <iframe>

Alex1990

/**
 * Description: Count a string (mixing English and Chinese characters) length. 
 *      A basic and rough function.
 * 
 * Performance:
 *      Multiple methods performance test on http://jsperf.com/count-string-length.
 *      You can see that using regexp to check range is very slow from the above test page.
 */
function strLen(str) {
    var count = 0;

Alex1990

/**
 * Stop propagation behavior for scroll of the element but body.
 * Compatibility: IE9+
 * Ref:
 * - http://stackoverflow.com/questions/5802467/prevent-scrolling-of-parent-element#answer-16324762
 * - https://developer.mozilla.org/en-US/docs/Web/Events/wheel
 */
;(function ($) {
  $.fn.scrollable = function () {
    this.on('wheel', function (event) {

Alex1990

var request = require('request');
var unzip   = require('unzip');
var csv2    = require('csv2');

request.get('http://s3.amazonaws.com/alexa-static/top-1m.csv.zip')
    .pipe(unzip.Parse())
    .on('entry', function (entry) {
        entry.pipe(csv2()).on('data', console.log);
    })
;

Alex1990

class Perf {
  constructor () {
    this.init()
    this.phases = []
  }

  init () {
    const now = Date.now()
    this.start = now
    this.lastTime = now

Alex1990

function promisify(func) {
  return (...args) => {
    const args1 = args.slice(0, args.length);
    return new Promise((resolve, reject) => {
      const callback = (err, ...rest) => {
        if (err) {
          reject(err);
        } else {
          resolve(...rest);
        }